12 
MARSUPIATA. 
as indicated by the above structural characters, may be sym¬ 
bolically expressed by arranging them in the following 
manner:— 
Thylacinus 
Dasyurds 
Didelphys - - - 
Pliascogale - -Myrmecobius - -Monotrkmata 
Perameles 
- Dromicia AcroUata - • - Tarsipes 
Hypsiprynmus Pseudocheirus Belidea 
Lagorchestes Bettongia Phalangista Petaurus 
Dendrolagus Cuscus 
- Halmaturus Phascolarctus 
Petrogale 
Macropus Osphranter 
Phascolomys. 
Remains of marsupial animals have been found in Europe, 
Australia, and South America. In the caverns which occur 
in the calcareous rocks in the interior highlands of Brazil, 
the bones of the small opossums are very numerous, but these 
are for the most part very nearly allied to, if not absolutely 
identical with, species still living in Brazil. In Europe, the 
most authentic remains of marsupial animals are those found 
in the gypsum quarries of Montmartre; the greater portion of a 
skeleton (fig. a), in which the marsupial hones remain in their 
